Wire cutting type electrical discharge machining system

Details Wire cutting type electrical discharge machining system Wire cutting type electrical discharge machining system

1985-02-26

1987-08-25

Pellinen, A. D.

Electric heating

Metal heating

Cutting or disintegrating

204206, 204224M, 219 69C, B23H 102, B23H 704

Patent

active

046894624

ABSTRACT:
A wire cutting type electrical discharge machining system includes a wire supply device, an upper and lower electrode guides, and a wire take-up device for feeding a wire electrode so as to carry out the discharge machining on an electrically conductive workpiece. An improved wire-disconnection detecting device attached to the system includes a first and second wire-slack detecting members of metallic tube through which the wire is passed with a small distance formed therebetween, a wire-disconnection detecting circuits connected between the detecting members and the wire, including a power supply, and a sensor for sensing a flow of current from the power supply through the detecting members and the wire upon contact of the two due to a slack of the wire. A disconnection of the wire is detected when the flow of current is sensed by the sensor.

REFERENCES:
patent: 3927293 (1975-12-01), Bell, Jr.
patent: 4298781 (1981-11-01), Inoue
patent: 4412118 (1983-10-01), Nomura et al.

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